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VERTICAL LINEARITY ADJUSTMENT (VERTICAL FREQUENCY: 60Hz)
Note: • Perform the following adjustments after completing the
Screen Voltage, X-Ray Protector and High-Voltage adjust-
ments.
1. Apply the 1080/60i size adjustment signal to INPUT A (Terminal Y
on the Component/RGB Input Card).
2. Adjust DM04 to set the vertical position of the image at the center of
the CRT screen.
3. Adjust DM02 to set the vertical amplitude of the image to 193mm.
4. Apply the 1080/60i crosshatch signal with circle pattern to INPUT A.
5. Adjust DX04 to set the sizes of the rectangles at the center of the
image and those at the left and right ends to be identical.
6. Adjust DX05 to set the sizes of the rectangles at the top and bottom
of the image to be identical.
7. Ensure that the center position is not deviated. If it is, adjust DM04
again.
8. Repeat adjustments in steps 1 to 7 until the center position and
vertical linearity become optimum. If the current image distortion is
serious, perform adjustments in steps 9 to 13 before re-performing
steps 1 to 7.
9. Adjust DM05 so that the second vertical lines from the left and right
edges are linear.
10. Adjust DM06 (W) and DM07 (S) to optimize the corner distortions.
11. Adjust DM08 to optimize the parallelogram distortion (observe the
second vertical lines from the left and right edges as the reference).
12. Adjust DM09 to optimize the trapezoidal distortion (observe the sec-
ond vertical lines from the left and right edges as the reference).
13. Adjust DM10 to optimize the horizontal arc distortion.
VERTICAL LINEARITY REFERENCE VALUE ADJUSTMENTS
Measuring Instruments Signal generator (Size adjustment signal, Crosshatch signal with circle pattern)
Card (Slot) Component/RGB Input Card (Slot 1)
Test Points
Adjustment Points DM02 (Vertical Size), DM04 (Vertical Position), DM05 (Side Pin Distortion), DM06 (Corner Distortion (W)),
DM07 (Corner Distortion (S)), DM08 (Parallelogram Distortion), DM09 (Trapezoidal Distortion), DM10 (Hori-
zontal Arc Distortion), DX04 (60Hz Vertical Linearity (S Correction)), DX05 (60Hz Vertical Linearity (C Correc-
tion)) [Service Menu]
193mm
Escutcheon
Make these lines liner.
Screen size
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